Unlock instant, AI-driven research and patent intelligence for your innovation.

Digital watermark embedding and extraction method for GIS vector data based on data mask

A technology of vector data and digital watermark, applied in the field of GIS vector data digital watermark embedding method and its extraction, to achieve the effect of good robustness

Inactive Publication Date: 2011-11-16
NANJING NORMAL UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this method is to modify the mask data instead of the carrier data, it will not have any impact on the accuracy of the carrier data

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Digital watermark embedding and extraction method for GIS vector data based on data mask
  • Digital watermark embedding and extraction method for GIS vector data based on data mask
  • Digital watermark embedding and extraction method for GIS vector data based on data mask

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. In this example, arcgis desktop is used to read the vector graphics file, the experimental data is the 1:10,000 topographic map of Zijin Mountain in Nanjing, shp format, and the copyright information is "Nanjing Normal University"; select the layer JMD_M, DLSS_L as the experimental layer , Gaussian projection, WGS84 coordinate system, extract the vertices of the experimental data, and form the vertex set layer pointfeatureclass, such as image 3 Shown in .b; buffer range buf=0.5 coordinate units. Create a digital watermark mask layer named Polyline.

[0033] The specific implementation process is as follows:

[0034] 1. GIS vector data mask generation and digital watermark embedding

[0035] (1) Watermark code generation. When the GIS vector data product is issued, the corresponding watermark code (also called watermark info...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a digital watermark embedding and extraction method for GIS vector data based on a data mask. The method ensures that element vertexes of carrier data above or below a strip reference line of a mask represent bit '1' or '0' by modifying the mask corresponding to the carrier data based on a watermark embedding principle of the relation, thereby obtaining corresponding watermark information according to the relation during the detection. The method modifies mask data, but not the carrier data so as not to cause any influence on the accuracy of the carrier data; moreover,the mask data can be synchronously transformed with the carrier data, so the method has better robustness on various operations such as projection operation, geometric transformation, data compressionand the like.

Description

technical field [0001] The invention belongs to the field of geographic information copyright protection, and in particular relates to a data mask-based digital watermark embedding method for GIS vector data and an extraction method thereof. Background technique [0002] GIS vector data is an important strategic information resource of the country. It is the basic data information for economic and national defense construction and social development. It has the characteristics of high production cost and high precision. Its copyright protection research is related to the copyright protection system of my country's geographic information digital products. Construction, the sharing and exchange of geographic information and the socialization of its services, the formation of copyright protection legislation drafts, the construction of national information security and the healthy development of geographic information-related industries. Copyright protection is copyright authent...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 周卫李安波陈颖张丽娟
Owner NANJING NORMAL UNIVERSITY